Hex Toaster

HexToaster 1.1

Numeric base converter for Mac OS X 10.9 and above.


  • Arbitrary precision – use a virtually unlimited number of digits. Limited only by RAM and processor speed
  • Convert any base from 2 to 36 to any other base
  • Special ASCII mode for converting ASCII digits to their numerical equivalents
  • Free! Free! Free!
  • Source code available under a GPL license!


All downloads
and source code are provided AS-IS, and WITHOUT WARRANTY. These files
are licensed under the GPL. Please see http://www.gnu.org/licenses/gpl.html
for license details.
Download Now

HexToaster.zip, 167 KiB

 Source Code

Available on GitHub!



  • Initial Release


  • Window size and position are saved and restored across
    application launches
  • Numeric base selectors are saved and restored across
    application launches
  • When the main window is closed, the application now exits


  • 64-bit only
  • Sandboxed
  • Code-signed
  • Added advanced AND, OR, XOR operations

What does this thing do?

Nothing much. Just converts between numbers with differing bases. Type in a decimal number, and see it’s equivalent in Hexadecimal, Octal, or even base 27. There is even a special ASCII mode (shown in the image above.) Type and use any base from two to 36 and the special ASCII mode.

Ahhh … Why?

Well, for some unfathomable reason, Apple didn’t see fit to include a easy to use base conversion utility with either OS X or the development tools. It’s a sad situation – even Windows includes base conversions in the default calculator utility. I mean, come on.

Again … Why?

I downloaded another utility from VersionTracker that actually wanted $5 to keep running. For something this simple. I couldn’t believe that there wasn’t another one out ther for free. So I wrote this one.

Ok. So how much does this cost?

Nothing. Not a cent. Download, use, and enjoy. If you’re feeling particularly froggy, send me some patches, updates, enhanced features.

Does that last answer mean the source is available?

Yes, download the source here. You’ll need XCode to build it out of the box. Additionally, you’ll need a copy of the GMP library on your system (by default in /usr/local/lib). You can download this from https://gmplib.org

So what’s the license?

Thesource and executable is licensed under the GPL. Please see http://www.gnu.org/licenses/gpl.html for license details.

Who can I contact if I have problems?

I definitely want to know if anyone has any problems running this on various platforms. Send email to jsk@toast442.org